This Blackberry Mousse Cake is a stunning dessert layered with soft blackberry-swirled cake, light blackberry mousse, and creamy blackberry buttercream frosting. With its vibrant berry flavor and elegant presentation, this blackberry mousse cake is perfect for birthdays, celebrations, or special gatherings.
Why You’ll Love This Recipe
This cake combines several irresistible textures in one dessert. The fluffy cake layers are swirled with sweet blackberry jam, the mousse filling is silky and light, and the buttercream frosting adds a rich creamy finish.
The fresh blackberry flavor shines through every bite, making this blackberry mousse cake feel refreshing rather than overly heavy. It’s also a great make-ahead dessert since the mousse benefits from chilling before assembling.
Ingredients
Blackberry Mousse
3/4 cup white chocolate chips
1 cup heavy cream, divided
1/3 cup seedless blackberry jam
1/3 cup powdered sugar
1 teaspoon vanilla extract
1/8 teaspoon fine salt
Blackberry Swirled Cake
1 cup unsalted butter, room temperature
2 1/2 cups granulated sugar
1 cup egg whites
3 cups cake flour
2 1/2 teaspoons baking powder
1 teaspoon fine salt
1 1/2 cups full-fat sour cream
1/4 cup vegetable oil
1 teaspoon vanilla extract
1/2 cup blackberry jam
Blackberry Buttercream Frosting
2 cups unsalted butter, room temperature
1 tablespoon vanilla extract
1/2 teaspoon fine salt
6 cups powdered sugar
1 tablespoon lemon juice
1/2 cup blackberry jam
Filling & Decoration
1/2 cup blackberry jam
2 pints fresh blackberries
Instructions
1. Prepare the Blackberry Mousse
Place white chocolate chips and 1/4 cup heavy cream in a heat-safe bowl. Microwave for 45–60 seconds and stir until smooth.
Add the blackberry jam and mix until fully combined.
In a separate bowl, whip the remaining heavy cream with powdered sugar, vanilla extract, and salt until soft peaks form.
Gently fold half of the whipped cream into the blackberry mixture, then fold in the rest.
Cover and refrigerate the mousse for at least 2 hours until chilled.
2. Bake the Blackberry Swirled Cake Layers
Preheat the oven to 350°F (175°C). Grease and line three 8-inch cake pans with parchment paper.
Cream the butter and granulated sugar in a stand mixer on high speed for about 3 minutes until light and fluffy.
Add the egg whites and mix until combined.
In a separate bowl, whisk together cake flour, baking powder, and salt.
Add half of the dry ingredients to the butter mixture and mix on low speed.
Add sour cream, oil, and vanilla extract, mixing until smooth.
Mix in the remaining dry ingredients.
Divide half of the batter between the prepared pans.
Drizzle blackberry jam over the batter and swirl gently with a knife.
Top with the remaining batter and smooth evenly.
Bake for 32–35 minutes until a toothpick inserted in the center comes out with a few moist crumbs.
Cool the layers for 10 minutes in the pans before removing and letting them cool completely.
3. Make the Blackberry Buttercream
Beat butter in a mixer for about 30 seconds until smooth.
Add vanilla extract and salt.
Gradually mix in powdered sugar and lemon juice until fully combined.
Add the blackberry jam and mix until the frosting reaches a smooth consistency.
4. Assemble the Cake
Place the first cake layer on a cake board.
Pipe a ring of buttercream around the edge to create a barrier.
Spread blackberry jam inside the ring and add a layer of chilled blackberry mousse.
Top with the second cake layer and repeat the filling process.
Add the final cake layer and apply a thin crumb coat of buttercream.
Chill the cake for about 30 minutes.
Apply the final coat of frosting and decorate with buttercream swirls and fresh blackberries.
Tips & Tricks
Always chill the mousse before assembling the cake to maintain its structure.
Use fresh blackberries for the best flavor and decoration.
Freezing the cake layers briefly helps make frosting easier.
A piping bag helps create clean layers when filling the cake.
Details
Prep Time: 1 hour
Cook Time: 35 minutes
Chill Time: 2 hours
Total Time: 3 hours 35 minutes
Yield: 12 slices
Category: Dessert
Method: Baking
Cuisine: American
Difficulty: Intermediate
Notes
If blackberry jam is very thick, slightly warm it before swirling into the cake batter.
You can also decorate the cake with additional fresh berries or edible flowers for an elegant finish.
Nutrition (Approximate)
Calories: 540
Protein: 5g
Carbohydrates: 70g
Fat: 28g
Fiber: 2g
FAQ
Can I make blackberry mousse cake ahead of time?
Yes. The cake layers and mousse can be prepared one or two days in advance.
Can I freeze the cake layers?
Yes. Wrap cooled cake layers tightly and freeze for up to one month.
Can I substitute other berries?
Yes. Raspberry or blueberry jam works well in this recipe.
Why chill the mousse before assembling?
Chilling helps the mousse firm up so it holds its shape between cake layers.
How do I prevent cake layers from sliding?
Chill the cake briefly after stacking each layer to stabilize it.
Storage
Store the cake covered in the refrigerator for up to 4 days.
Slices can be frozen for up to 2 months. Thaw overnight in the refrigerator before serving.
Similar Recipes
Blackberry Mousse Cake Recipe
Ingredients
Blackberry Mousse
- 3/4 cup white chocolate chips
- 1 cup heavy cream divided
- 1/3 cup seedless blackberry jam
- 1/3 cup powdered sugar
- 1 teaspoon vanilla extract
- 1/8 teaspoon fine salt
Blackberry Swirled Cake
- 1 cup unsalted butter room temperature
- 2 1/2 cups granulated sugar
- 1 cup egg whites
- 3 cups cake flour
- 2 1/2 teaspoons baking powder
- 1 teaspoon fine salt
- 1 1/2 cups full-fat sour cream
- 1/4 cup vegetable oil
- 1 teaspoon vanilla extract
- 1/2 cup blackberry jam
Blackberry Buttercream Frosting
- 2 cups unsalted butter room temperature
- 1 tablespoon vanilla extract
- 1/2 teaspoon fine salt
- 6 cups powdered sugar
- 1 tablespoon lemon juice
- 1/2 cup blackberry jam
Filling & Decoration
- 1/2 cup blackberry jam
- 2 pints fresh blackberries
Instructions
Prepare the Blackberry Mousse
- Place white chocolate chips and 1/4 cup heavy cream in a heat-safe bowl. Microwave for 45–60 seconds and stir until smooth.
- Add the blackberry jam and mix until fully combined.
- In a separate bowl, whip the remaining heavy cream with powdered sugar, vanilla extract, and salt until soft peaks form.
- Gently fold half of the whipped cream into the blackberry mixture, then fold in the rest.
- Cover and refrigerate the mousse for at least 2 hours until chilled.
Bake the Blackberry Swirled Cake Layers
- Preheat the oven to 350°F (175°C). Grease and line three 8-inch cake pans with parchment paper.
- Cream the butter and granulated sugar in a stand mixer on high speed for about 3 minutes until light and fluffy.
- Add the egg whites and mix until combined.
- In a separate bowl, whisk together cake flour, baking powder, and salt.
- Add half of the dry ingredients to the butter mixture and mix on low speed.
- Add sour cream, oil, and vanilla extract, mixing until smooth.
- Mix in the remaining dry ingredients.
- Divide half of the batter between the prepared pans.
- Drizzle blackberry jam over the batter and swirl gently with a knife.
- Top with the remaining batter and smooth evenly.
- Bake for 32–35 minutes until a toothpick inserted in the center comes out with a few moist crumbs.
- Cool the layers for 10 minutes in the pans before removing and letting them cool completely.
Make the Blackberry Buttercream
- Beat butter in a mixer for about 30 seconds until smooth.
- Add vanilla extract and salt.
- Gradually mix in powdered sugar and lemon juice until fully combined.
- Add the blackberry jam and mix until the frosting reaches a smooth consistency.
Assemble the Cake
- Place the first cake layer on a cake board.
- Pipe a ring of buttercream around the edge to create a barrier.
- Spread blackberry jam inside the ring and add a layer of chilled blackberry mousse.
- Top with the second cake layer and repeat the filling process.
- Add the final cake layer and apply a thin crumb coat of buttercream.
- Chill the cake for about 30 minutes.
- Apply the final coat of frosting and decorate with buttercream swirls and fresh blackberries.
Notes
Conclusion
This Blackberry Mousse Cake is a show-stopping dessert with layers of soft cake, airy mousse, and creamy buttercream. The bright blackberry flavor and beautiful presentation make it a perfect centerpiece for celebrations or special occasions.